The Lake Mead/Lake Powell/Colorado River system is currently at about 50% capacity. Based on current water use & projected future demand, the system is on an unsustainable death spiral. Things are so bad that there is a 10% chance Lake Mead could be dry by 2014. That should be alarming for residents of the southwest, to say the least.

This is one of many problems that require quick action by state & local government & lifestyle changes by people. Without that action & those changes, the southwest is heading for a "major societal disruption".